Thanks Bloc97. This is best solution so far. This will certainly part of presentation to our bosses.
Is there any similar 3 display, no fan, graphic cards as alternative? (Out bosses always like second sources).
If it isn't for gaming, you can always resort to other less popular companies with cheaper graphic cards (doesn't mean it breaks more often) that perform very well for 2D graphics like S3 or Matrox. Since they are less powerful, they produce less heat, so buy the ones without a fan if noise matters to you.
With Matrox that does 2D Business-Class graphic cards with long product life cycles, you can drive up to 16 screens with some of their cards. Some of them also uses the PCI-E x1 or even a standard PCI port, their company really have an nice collection of slot types.
They offer very compact-type graphic cards by using one proprietary output and using an splitter cable.http://www.matrox.com/graphics/en/products/graphics_cards/
But the ones you really need for 3 or more monitors are the M or P-Series.
M-Series are more performant
P-Series are more power-efficient
Edit : Only M-Series supports 4 monitors.